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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-m68k/virtconvert.h | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-m68k/virtconvert.h')
-rw-r--r-- | include/asm-m68k/virtconvert.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/include/asm-m68k/virtconvert.h b/include/asm-m68k/virtconvert.h new file mode 100644 index 0000000..8c4e803 --- /dev/null +++ b/include/asm-m68k/virtconvert.h @@ -0,0 +1,76 @@ +#ifndef __VIRT_CONVERT__ +#define __VIRT_CONVERT__ + +/* + * Macros used for converting between virtual and physical mappings. + */ + +#ifdef __KERNEL__ + +#include <linux/config.h> +#include <linux/compiler.h> +#include <asm/setup.h> +#include <asm/page.h> + +#ifdef CONFIG_AMIGA +#include <asm/amigahw.h> +#endif + +/* + * Change virtual addresses to physical addresses and vv. + */ +#ifndef CONFIG_SUN3 +extern unsigned long mm_vtop(unsigned long addr) __attribute_const__; +extern unsigned long mm_ptov(unsigned long addr) __attribute_const__; +#else +static inline unsigned long mm_vtop(unsigned long vaddr) +{ + return __pa(vaddr); +} + +static inline unsigned long mm_ptov(unsigned long paddr) +{ + return (unsigned long)__va(paddr); +} +#endif + +#ifdef CONFIG_SINGLE_MEMORY_CHUNK +static inline unsigned long virt_to_phys(void *vaddr) +{ + return (unsigned long)vaddr - PAGE_OFFSET + m68k_memory[0].addr; +} + +static inline void * phys_to_virt(unsigned long paddr) +{ + return (void *)(paddr - m68k_memory[0].addr + PAGE_OFFSET); +} +#else +static inline unsigned long virt_to_phys(void *address) +{ + return mm_vtop((unsigned long)address); +} + +static inline void *phys_to_virt(unsigned long address) +{ + return (void *) mm_ptov(address); +} +#endif + +/* Permanent address of a page. */ +#define __page_address(page) (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT)) +#define page_to_phys(page) virt_to_phys((void *)__page_address(page)) + +/* + * IO bus memory addresses are 1:1 with the physical address, + * except on the PCI bus of the Hades. + */ +#ifdef CONFIG_HADES +#define virt_to_bus(a) (virt_to_phys(a) + (MACH_IS_HADES ? 0x80000000 : 0)) +#define bus_to_virt(a) (phys_to_virt((a) - (MACH_IS_HADES ? 0x80000000 : 0))) +#else +#define virt_to_bus virt_to_phys +#define bus_to_virt phys_to_virt +#endif + +#endif +#endif |